This consortium aims to develop an experimental platform that recapitulates the architecture of human cancers. Three-dimensional “spheroid” cultures, lab-on-a-chip, so-called microfluidics and 3D bioprinting solutions have already contributed to physiologically much more relevant model systems – compared to standard two-dimensional monolayer cultures. However, such models are not yet more predictive for the outcome of treatment in clinical practice! There is still a high demand for better models that recapitulate or mimic the response of functional and living tissues, not just single cells, to anti-cancer therapies. Ideally, better platforms for testing anti-cancer therapies should also provide a possibility for fast microscopic imaging. This imaging-based evaluation of drug effects is entirely based on structural information. With a platform like this, we can not only test drugs, but also means to specifically deliver compounds to the cancer cells.